| 학회 |
한국공업화학회 |
| 학술대회 |
2021년 가을 (11/03 ~ 11/05, 대구 엑스코(EXCO)) |
| 권호 |
25권 2호 |
| 발표분야 |
[촉매] 환경촉매기술의 현황: 실험실 연구부터 실제 적용까지 |
| 제목 |
Simple physical mixing of zeolite prevents sulfur deactivation of vanadia catalysts for NOx removal |
| 초록 |
NOx abatement has been an indispensable part of environmental catalysis for decades. Selective catalytic reduction with ammonia using V2O5/TiO2 is an important technology for removing NOx emitted from industrial facilities. However, it has been a huge challenge for the catalyst to operate at low temperatures, because ammonium bisulfate (ABS) forms and causes deactivation by blocking the pores of the catalyst. Here, we propose that physically mixed H-Y zeolite effectively protects vanadium active sites by trapping ABS. The mixed catalysts operate stably at a low temperature of 220 °C. The sulfur resistance of this system is maintained during repeated aging/regeneration cycles because the trapped ABS decomposes at 350 °C. Further investigations reveal that the pore structure and the amount of framework Al determined the trapping ability of zeolites. Our results suggest a novel concept of absorptive protection of catalyst, overcoming the deactivation of catalyst. |
| 저자 |
이황호, 전세원, 황건하, 김도희
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| 소속 |
서울대 |
| 키워드 |
NH3-SCR; Vanadia titania; physical mixing; zeolite; ammnonium bisulfate
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| E-Mail |
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